R3 wrote:CASTLE OF DREAMS [...] changed VPALACE.DAT to the original palette [...] problem

The reason is that The Castle of Dreams has a PRINCE.EXE that uses the dungeon wall-drawing algorithm (WDA) in palace levels. This means, as CusPop warns, "[...] you must import the extra resources to your palace environment file with PR". As a side note, this PRINCE.EXE also does not have all resources enabled in all levels. Anyway, I saw that you already finished playing this mod, so problem solved, I guess.

You have two choices if you want to keep these:
a) Hex-edit the mod's PRINCE.EXE not to use WDA in palace.
b) Make a new PRINCE.EXE with CusPoP with all these changes except WDA.

(By the way, Norbert, it would be useful if diffpop told me *what* is 200 on level 12a, for example.
I.e. it should either display the name attribute of the containing <folder> and <hack> tags,
or come with a custom princehack.xml that has more informative names in <read> tags.)